LRD熱繼電器，是雙金屬片式熱過載繼電器（以下簡稱熱繼電器）主要用于交流50Hz或60Hz，額定絕緣電壓660V及以下,電流0.1～630A的電路中，作電動機過載、斷相、起動時間過長、堵轉時間過長的保護。熱繼電器可與對應的交流接觸器接插安裝，又可獨立安裝。

 交流三極接觸器 LC1D09B7C LC1D09C7C LC1D09CC7C LC1D09D7C LC1D09E7C LC1D09F7C LC1D09FE7C LC1D09L7C LC1D09M7C LC1D09N7C LC1D09P7C LC1D09Q7C LC1D09U7C LC1D09V7C LC1D12B7C LC1D12C7C LC1D12CC7C LC1D12D7C LC1D12E7C LC1D12F7C LC1D12FE7C LC1D12L7C LC1D12M7C LC1D12N7C LC1D12P7C LC1D12Q7C LC1D12U7C LC1D12V7C LC1D18B7C LC1D18C7C LC1D18CC7C LC1D18D7C LC1D18E7C LC1D18F7C LC1D18FE7C LC1D18L7C LC1D18M7C LC1D18N7C LC1D18P7C LC1D18Q7C LC1D18U7C LC1D18V7C LC1D25B7C LC1D25C7C LC1D25CC7C LC1D25D7C LC1D25E7C LC1D25F7C LC1D25FE7C LC1D25L7C LC1D25M7C LC1D25N7C LC1D25P7C LC1D25Q7C LC1D25U7C LC1D25V7C LC1D32B7C LC1D32C7C LC1D32CC7C LC1D32D7C LC1D32E7C LC1D32F7C LC1D32FE7C LC1D32L7C LC1D32M7C LC1D32N7C LC1D32P7C LC1D32Q7C LC1D32U7C LC1D32V7C LC1D38B7C LC1D38C7C LC1D38CC7C LC1D38D7C LC1D38E7C LC1D38F7C LC1D38FE7C LC1D38L7C LC1D38M7C LC1D38N7C LC1D38P7C LC1D38Q7C LC1D38U7C LC1D38V7C LC1D40B7C LC1D40E7C LC1D40F7C LC1D40M7C LC1D40Q7C LC1D50B7C LC1D50E7C LC1D50F7C LC1D50M7C LC1D50Q7C LC1D65B7C LC1D65E7C LC1D65F7C LC1D65M7C LC1D65Q7C LC1D80B7C LC1D80E7C LC1D80F7C LC1D80M7C LC1D80Q7C LC1D95B7C LC1D95E7C LC1D95F7C LC1D95M7C LC1D95Q7C